Elastic binding tape



June 22, 1943. I J v MOORE 2,322,382

ELASTIC BINDING TAPE Filed April 13, 1942 Patented June 22,. 1943 rear orgies ELASTIC BINDING TAPE John V. Moore, Pawtucket, R. 1., assignor to .ll/Ioore Fabric Company, Pawtucket, 'R. "1.," a c'orporation of Rhode'lsland Application April13, 1942, Serial No. 438,817

3 Claims.

This invention relates to an elastic binding tape capable of general application but particularly adapted-for use in shoes of the type shown in Tweedie Patent No 252403316, issued May 6, 1941.

As disclosed in said patent, an elastic binding tape has been 'found to provide a desirable finish around the-topedge of the foot opening of a low shoe or pump, and such a binding tape is particularly desirable where the adjacent parts of the shoe upper are formed in whole or in part of stretchable or elastic material.

It is the general object of my invention to provide an improved elastic binding tape for such purposes, which is more convenient in application and more effective in use than the tape heretofore used for this and other similar purposes.

To the accomplishment of this purpose, I provide a tape having relatively thick and relatively thin parallel longitudinal portions, and I further provide a tape in which both the thick and the thin portions have substantially equal contractive pull or tension for equal widths and equal stretch. I am thus able to produce a stronger tape for a given width and thickness, or a lighter tape of equal strength.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. l is a plan view of a portion of my improved tape;

Fig. 2 is a transverse sectional elevation, taken along the line 22 in Fig. 1;

Fig. 3 is a weave diagram taken warp-wise and substantially along the line 3-3 in Fig. 1;

Fig. 4 is a similar view, taken along the line 1-4 in Fig. 1;

Fig. 5 is a diagrammatic representation of a portion of the face of the thicker portion of the fabric;

Fig. 6 is a similar view of the back of the thicker fabric; and

Fig. 7 is a weave diagram of either the face or the back of the thinner fabric.

Referring to the drawing, I have shown my improved elastic binding tape as comprising a thicker elastic fabric A and a thinner elastic fabric B, the portion 13 commonly serving as a sewing selvage and being stitched to the edge of the shoe upper.

The portion A comprises a plurality of nonelastic warps 10, together with spaced elastic warps ll interspersed therewith. The fabric B similarly comprises "a plurality of non-elastic warps I4 andspaced elastic warps l5. Non-elastic filling or weft threads 16 extend transversely of the fabric, as is customary and as is indicated in Fig. 3.

My jinvention isnotflimited vto any particular weaves to be used in the portions A and 'B, but for purposes of illustration I have shown the thicker portion A as having a skip twill or sevenup and three-down weave, while the thinner portion B has an ordinary two-up and twodown weave.

The distribution of warp threads in the thicker or twill weave portion A is shown in Figs. 5 and 6, the warp threads which appear on the face being shown in Fig. 5, and the warp threads which appear on the back being shown in Fig. 6'. The elastic warp threads I I in the portion A are relatively heavy and are preferably covered and are introduced in spaced pockets as indicated in Fig. 5. These rubber threads II. are preferably of substantially twice the diameter of rubber threads l5 which are introduced in spaced pockets in the thinner portion or sewing selvage B, as indicated in Fig. 7.

The elastic threads 15 are however of a stronger and more dynamic type of rubber, so that the elastic pull or tension of the smaller elastic warp threads 15 is substantially equal to that of the larger elastic warp threads ll. Such relatively small but strong threads are commercially available, one example being the Fulflex Dynamic thread manufactured by Carr Fulflex, Inc. of Bristol, Rhode Island.

In Fig. 3 I have shown the interlacings of the non-elastic twill warp threads Ill, the nonelastic filling threads 16, and the larger elastic warp threads II.

In Fig. 4 I have shown the interlacings of the non-elastic warp threads M in the thinner portion or sewing selvage 13, together with the filling threads l6 and the smaller elastic warp threads 15.

Having described the construction and characteristics of the various parts of my improved binding tape, the advantages thereof will be readily apparent. Referring to Fig. 2, it will be seen that by using more dynamic rubber in the thin selvage portion B, I provide a tape which is of the same total contractive pull or tension for a given width as a tape using ordinary rubber and of the greater thickness of the portion A for its full width. Conversely, for a tape of equal total contractive pull or tension, I may not only use a thin portion 13 but I may also reduce the thickness of the portion A, as it is not necessary to have extra thickness in the portion A to make up for reduced strength in the thin portion B, which would happen if the rubber threads H and I5 had their contractive pulls or tensions proportionate to their diameters.

I am thus able to equalize the strength of the thin and thick portions of my tape by using a smaller and more dynamic type of rubber for the threads l5, so that they possess approximately double the strength of the usual type of rubber used in the threads H.

A tape with a sewing selvage has certain 0bvious advantages, which I attain without increased bulk in the remaining Width of the tape,

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. An elastic binding tape comprising a relatively thick longitudinal body portion and a relatively thin longitudinal sewing selvage, said body portion and said sewing selvage each comprising elastic and non-elastic warp threads and non-elastic weft threads, and the elastic warp threads being of less diameter'in said sewing selvage but of substantially the same elastic strength per thread as in the body portion, and. said tape being of substantially equal elastic strength per unit of width in all transverse portions thereof.

2. An elastic binding tape comprising a relatively thick longitudinal body portion and a relatively thin longitudinal sewing selvage, said body portion and said sewing selvage each comprising elastic and non-elastic warp threads and. non-elastic weft threads, the elastic warp threads being spaced substantially equal distances apart for the full width of the binding tape and all being of substantially equal elastic strength but the elastic warp threads in said body portion being of substantially greater diameter.

3. An elastic binding tape comprising a relatively thick longitudinal body portion and a relatively thin longitudinal sewing selvage, said body portion and said sewing selvage each comprising elastic and non-elastic warp threads and nonelasticiweft threads, the elastic warp threads in the body portion being of substantially twice the diameter of the elastic warp threads in the sewing selvage but being of substantially the same elastic strength per thread and being spaced to provide at least as great elastic strength per unit of width in the selvage portion as in the body portion.

JOHN V. MOORE. 

